Table 2
List of H2O transitionsa detected with PACS in L1157–B1, at the nominal position of B1 (spaxel centered at offset (0′′,0′′)) and at the high-J CO peak (spaxel at offset (−5′′,7′′)).
| Transition | Frequency | λ | Eu/kB | HPBW | Fluxb | Line_Id | |
|
|
|||||||
| (GHz) | (μm) | (K) | (arcsec) | (× 10-17 W m-2/pixel) | |||
| offset (0′′,0′′) | offset (−5′′,7′′) | ||||||
|
|
|||||||
| o-H2O 221 − 212 | 1661.008 | 180.49 | 159.8 | 12.7 | 2.6 ± 0.2 | 2.7 ± 0.3 | 1 |
| 212 − 101 | 1669.905 | 179.52 | 80.1 | 12.7 | 12.1± 0.2 | 12.9 ± 0.3 | 2 |
| 303 − 212 | 1716.769 | 174.63 | 162.5 | 12.3 | 6.2± 0.3 | 6.5 ± 0.3 | 3 |
| 423 − 414 | 2264.149 | 132.41 | 397.9 | 9.4 | <0.6c | 0.6 ± 0.2 | 4 |
| 414 − 303d | 2640.474 | 113.54 | 289.2 | 8.0 | 2.8 ± 0.5 | 3.7± 0.4 | 5 |
| 221 − 110 | 2773.978 | 108.07 | 159.8 | 7.6 | 3.2 ± 0.4 | 3.9 ± 0.5 | 6 |
| 321 − 212 | 3977.046 | 75.38 | 271.0 | 5.3 | <2.1c | 1.9 ± 0.7 | 7 |
| p-H2O 313 − 202 | 2164.132 | 138.53 | 204.7 | 9.8 | 2.7 ± 0.3 | 2.7 ± 0.3 | 8 |
| 404 − 313 | 2391.573 | 125.35 | 319.5 | 8.9 | 1.1 ± 0.3 | 1.4 ± 0.3 | 9 |
Notes.
Frequencies taken from the JPL spectroscopic catalog (Pickett et al. 1998).
This line is blended with the CO (23–22) transition. To estimate the flux of the water line we subtracted the flux of CO (23–22) transition predicted by the model presented in Benedettini et al. (2012).
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